Equations / Root biomass
Mopane root biomass from D (RM1)
As printed (Table 6, model RM1, p. 10)
In this library's units, ready to compute (kg)
Root biomass = exp(-1.927 + 1.964 * ln(D))D- Diameter at breast height (1.3 m), cm
Best-fitting root model per the authors. Root biomass (BGB) is stump plus coarse roots from excavation; fine roots under 2 mm were not sampled. n and ranges are not stated separately for the root sample, so they are omitted. No back-transformation correction factor is stated or applied. n = 120 sampled trees (Methods p. 3, Table 3), but Table 5 heads the total-AGB column 'n = 84', so the fitted n may be 84.
doi:10.1038/s41598-025-87297-w · Open access · copy we read
RM1 ... R-square 97.83
RM1 was the best-fitting model with a higher AICw than RM2 and RM3
- R²
- 0.9783
- Method
- MM-estimator robust regression (ln Y = ln a + b ln D)
- Where
- Mabalane (Gaza) and Tambara (Manica) districts, mopane woodland
- Last checked
- 2026-11-01
Shaded: the DBH range the model was fitted on. Other inputs held at the values above.
On every build, the library's form and the paper's own form (in its units) must both give these values within 1%.
| Inputs | Expected | We get | From |
|---|---|---|---|
| D = 20 | 52.3 | 52.3 | Computed from the printed form computed from the published form |
Related
- Mopane root biomass from D²H (RM3) · Lisboa et al. 2025 · DBH + Height
- Mopane height from D (power H-D model) · same paper · Height
- Mopane root biomass from D²H (RM3) · same paper · Root biomass
- Mopane total AGB from D (TM1) · same paper · Aboveground biomass
- Mopane total AGB from D and H (TM2) · same paper · Aboveground biomass
- Mopane total AGB from D²H (TM3) · same paper · Aboveground biomass